diff --git a/docs/sphinx_dd_extension/dd_domain.py b/docs/sphinx_dd_extension/dd_domain.py
index 33374c0d..cce9d8d0 100644
--- a/docs/sphinx_dd_extension/dd_domain.py
+++ b/docs/sphinx_dd_extension/dd_domain.py
@@ -445,7 +445,7 @@ def __init__(self, name, data_type, typ, units, summary, has_error):
 
 # Visitors of DDNode for HTML documentation:
 def visit_ddnode(self, node: Element) -> None:
-    self.body.append(self.starttag(node, "details"))
+    self.body.append(self.starttag(node, "details", title="Click to expand"))
 
 
 def depart_ddnode(self, node: Element) -> None: